Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f18edcaab5630e…

MALICIOUS

PDF

91.4 KB Created: 2021-10-30 22:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 728d39fdc0e01cc7ba1dbcff627e4a2e SHA-1: bc32be7506d75ac4fb043d41ea6461206035ab0f SHA-256: 09f18edcaab5630e04c8124f9edfd34781db8fea77f26244df5a0a4bb1e9c8e1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure to phishing or malware download sites. The presence of embedded JavaScript points to potential exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://allprintusa.com/admin/images/file/93284443344.pdf In PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/88861214571.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/sitarewanipimiwilukuvel.pdfIn PDF document text
    • http://perksys.com/userfiles/file/fusolo.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210926065233.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/dibisazogabofivevikabe.pdfIn PDF document text
    • http://kovofilm.cz/userfiles/file/11321241287.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/7415702019.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/72100601615.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/24546478818.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16168f99df0c5e---mogexolekinur.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/55504701692.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/98264979641.pdfIn PDF document text
    • https://khanikango.in/file/pujurefapomog.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/wadisumal.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/70393054677.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/93323188517.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/jesudalut.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/53098841280.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/76879535668.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/1920979667.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/jumobovijozuli.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/BcFPVxLj4jw/uplcv?utm_term=fortran+resize+arrayPDF link annotation
    • https://b2cdemo.tickets.com/content/files/19049247540.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA5 10204 bytes
SHA-256: a588b062cb870babe3375449bd1c6f0b48cef21a4ac66ce303c716189999ed2e
font_01_sfnt_off000116c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED3 18452 bytes
SHA-256: 004206dc25c52f960161e9c78aaf0cb01d8cecf1e29c8693666a42f7c292704f

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